Adam Dorris, chef at Revival Market, stands in the kitchen while working at Bar Tartine during his staging time in San Francisco, California Friday, February 21, 2014 Staging, pronounced "stah-zhing," is an internship where chefs work temporarily at a different restaurant to learn new techniques and cuisines.

Adam Dorris, chef at Revival Market, stands in the kitchen while...

Adam Dorris held up his right thumb in the clear sunlight of a San Francisco spring afternoon, and it was a mess. The ball was crosshatched with angry lines, some red and some faded to brown, so many of them that the swollen flesh underneath had turned a sullen shade of rose-purple.

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